Union



(No-Model.) 2 Sheets-Sheet l.

L. ONDERDONK.

LOOPEBJ MEGHANISM POR SEWING MACHINES. 10.591,541. Patented oct. 12, .1897.

im" Il (No Model.) 1 2 Sheets-Sheet '2. L. ONDERDONK,

LOOPER MECHANISM FOR* SEWING MACHINES.

110.591,541. Patented Oct. 12,18%?.

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` NITED STATES PATENT Fries.

LANSING ONDERDONK, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS.

LQOPER IVIECHANISIVI FOR SEWING-MACHINES.

SPECIFICATION arming part of Letters Patent No. 591,541, dated october 12, 1897.

Application filed January 23, 1896. Serial No. 576,593. (No model.)

To LZZ whom it may concern:

Beit known that I, LANSING ONDERDONK, a

. citizen of the United States, residing at Boston, in the county of Suffolk, State of Massachusetts, have invented certain new and useful Improvements-in Sewing-Machines, (Case E,) of which the vfollowin g is a description, reference being had to the accompanying drawings, and to the letters and gures of reference marked thereon. iy Y l My invention relates to an improvement in sewing-machines, and particularly to a machine having a cylindrical arm or bed-plate within which are included certain of the operating parts, the feeding mechanism working longitudinally of said arm, thus rendering the machine useful for sewing tubular articles. While as to certain features the invention is particularly applicable to such machines, it will be understood that in other respects the features shown, described, and claimed may be applied to any of the wellknown kinds ofsewing-machines.

Theinvention primarily includes a sewingmachine with its parts arranged and operating substantially as herein shown and described.

The invention also includes a certain peculiar construction of looper-operating mechanism and also certain details ofthe feeding mechanism whereby the latter is adapted` especially to coperate with a looper-operating mechanism constructed on the plan hereinafter described, and, finally, various ldetails of construction of the parts, as hereinafter described and claimed.

In the accompanying drawings, which illustrate the invention,A Figure l is a side elevation 'of a sewing-machineembodying the invention. Fig. 2 is a plan View showing the upper part and the top of the cylindrical casing removed. Figs. 3 and tare detail views I 'of the feed-operating mechanism; Figs. 5

through both shaft and eccentric.

needle-lever D, needle-bar E, presser-bar F', needles a, loopers b, and presser-foot c. As herein shown, broadly, the looper-operating mechanism comprises the carrier d, to which the looper is secured, which looper-carrier is fixed to a transverse shaft e, having a sliding and rocking movement iniixedbearings, by means of a pin or rod f, eccentrically connected with the main or driving shaft of the machine and fulcrumed in the looper-carrier d or shaft e., whereby in the rotation of the driving-shaft, a loop-taking movement in the arc of 'a circle and a needle-avoiding movement at right angles to the loop-taking movement are imparted to said looper. The main or driving shaftG is herein shown as extending longitudinally throughout almost the entire length of the cylindrical bed-plate or casing B, and at its outerr end is provided with a belt-wheel H, and from this shaft, by means of an eccentric and rod connection, motion is imparted to the needle-lever. For convenience of the operator in putting in or taking out the work, or in case it is desired to run the machine slowly, a transverse lshaft G is provided, having a beveled gear g, meshing with a beveledl gear g on the main shaft, said shaft G having on it outer end a hand-wheel. The beveled gears g g may normally mesh or there may be a clutch connection to throw them into or out of opperative relation, The main or driving shaft Cr is j ournaled near its outer end in the-'standard L, and at a point intermediate the length of said shaft there is secured upon it,by means of a pin o, an eccentric M, which pin passes This eccentric is preferably arranged with its vertical axis at an inclination to the longitudinal axis of the driving-shaft, and its angle of inclination is adjusted by means of screws p, passing through the driving-shaft and bearing against lugsg, projecting from the eccentric, thus swinging the eccentric in one direction or the other on its pivot as the screws are turned. This eccentric is provided with a groove r, in which fits a strap O, having an upwardly-projecting post s, screw-threaded, as shown, for the reception of the n'ut P represents a bar or rod pivote-d at its rear end between lugs or uprights q', project- IOO ing upwardly from the rock-shaft R, which is journaled in the frame of the machine. This bar P works in a groove u, formed in the standard L, and at its forward end is widened to form two branches n e, the space between allowing of room for the operation of the looper mechanism. Secured to the outer ends of these branches or forks t 'v by screws yw is a yoke or arched piece S, carrying the feed-dog. The parts P, r, and S constitute a feed-dog-carrying bar or frame. The bar P is formed with a half-socket and the corresponding part of the socket is formed in the piece T, secured by means of screws y to the bar P, the two when placed in position forming a socket for the reception of a ball U on the post s. By this arrangement a ball-joint connection between the strap and the feed-dog-carrying bar is provided, and as the shaft rotates, and with it the eccentric, the strap fitting in the groove of the eccentric is raised and lowered and the bar P, and with it the feed-dog, also raised and lowered. Simultaneously, by reason of the pivotal connection of the bar or rod P with the rocking frame formed by the uprights Q and rock-shaft R and the inclination of the eccentric to the axis of the driving-shaft, the bar or rod P will be reciprocated backward and forward, any variation of the angle of the eccentric M with respect to the drivingshaft increasing or diminishing the amount of forward-and-backward movement of the feed-dog, and consequently the length of the stitch.

I will now describe the looper-operating mechanism, which, broadly speaking, is the equivalent of that shown and described in applications filed January 3, 1896, Serial No. 571,215; January 1, 1896, Serial No. 574,381, and January 7, 1896, Serial No. 571,638, but which, as far as certain details of construction and methods of adjustment are concerned, differ therefrom, The looper Z) is arranged to work in the space allowed therefor between the branches n i* of the feed-dogcarrying bar and the rod f, as shown in Figs. 1 to G, and is connected by a ball-and-socket joint to the inclined projection on the collar k, arranged on the end of the driving-shaft and adjustable radially thereon. The loopercarrier is provided with a fulcrum-pin for the rod f, said rod and fulcrum-pin being slotted to receive a post 2, flattened as shown, and having a shoulder 3 resting on the e11- larged head 7 of the sleeve 8, projecting down through the casing and screw-threaded at its lower end to receive the collar 4. The lower end of said post is screw-threaded at 5 for the reception of a nut G, which bears against the collar et and acts as a jam-nut to hold the post in any position in which it is placed. The opening through the casin g is larger than the diameter of the sleeve, so that movement horizontally in all directions is permitted to the post, but by the shoulder 3, enlarged head 7, and collar 4 vertical displacement is prevented. A forward and backward adjustment in the slot of the fulcrum-pin and rod varies the amount of throw of the loopercarrier and its transverse shaft, while an adjustment forward or back of the plane of the center of the driving-shaft will throw the movement of the looper more to one side 0f the needle than to the other. Any number of loopers may be applied to the looper-carrier and they may be arranged in any manner desirable with respect to the needles, of which also any number may be employed.

In the arrangement shown in Fig. 9 the looper-rod f is rigidly connected to the collar 7c on the main shaft instead of universally, and in both Figs. 1 and 9 the arrangement illustrated in Figs. 5 and G for adjusting the looper-carrier is dispensed with.

The take-up is herein shown as applied to a feed-up-the-arm machine, but it will be understood that it may be applied to any sewing-machine, and while it is advantageous to have the take-up operated bythe needle-lever extension it may be operated by another moving part of the machine. The needle-lever is provided with a downwardly-projecting portion 10, either integral therewith or formed separately and attached thereto. This part 10 carries at its lower end a forked piece 11, having eyes 12, forming guides for the looperthread. Projecting into the plane of these guiding-eyes 12 and adapted to be engaged by the thread as the forked piece 11 reciprocates back and forth under the action of the needle-lever is a cam-piece 13, adj ustably secured to the machine-frame by slots and screws 14 15. An eye 1G, attached to the machine-frame, and the opening 17 through the casing serve also as guides for the loopcrthread. lVhile the looper is moving backward and the slack is being taken up by the movement of the piece 1l, drawing the thread over the cam, it is necessaryto hold the thread at some point between the take-up and tension to prevent pulling off more thread from the spool, and for this purpose I provide two plates or nipper-springs 18, 19, one, 18, being secured to the machine-arm, and only one of which, 19, may be of spring metal, this being adjustably secured to the plate 18 by slots and screws 2O 21 and has a raised portion 22, upon which is adapted to bear a projection (herein shown as a screw 23) on the needle-lever extension, so that as the needle-lever projection moves backward the needle moves down and the looper backward, whereby the slack on the looper-thread is taken up, the spring`19 will be compressed on the plate 18 and nip the thread firmly and prevent any being pulled off from the spool.

The end of the bed-plate or casing is provided with a suitable end cap, as Y, which is either hinged or removable to allow of access to the working paris, and a removable.

top plate may alsov be provided.

Various modifications and changes in the construction of the machines may be made IOO IIO

slide and rock in bearings on the machine-v frame, a looper-carrier supported on said shaft, a looper on said carrier arranged with its longitudinal axis at an angle to the axis of said transverse shaft and a rod operatively connected with said looper-carrier or shaft,for giving it an oscillatory movement in the direction of the length of the looper and a sliding movement across the line traversed by said looper in its oscillating movement, said rod being eccentrically connected at its inner en d to the driving-shaft; substantially as described.

2. A sewing-machine comprising a drivingshaft, a feed-dog-carrying bar or frame arranged parallel therewith, connections between the driving-shaft and feed-dog-carrying bar whereby the latter is given the usual four motions, and a shaft arranged transversely of the driving-shaft, and adapted to slide and rock in bearings on the machineframe, a looper carrier supported on said shaft, a looper on said carrier arranged with its longitudinal axis at an angle to the axis of v said transverse shaft and a rod operatively connected with said looper-carrier or shaft,for giving it an oscillatory movement in the direction of the length of the looper and a sliding movement across the line traversed by said looper in its oscillating movement, said rod having an eccentric and universal-joint connection with the driving-shaft, substantially as described.

3. In a sewing-machine having a cylindrical casing and a driving-shaft extending lengthwise thereof, a feed-dog-carryin g bar arranged parallel with said driving-shaft, an eccentric adjustably inclined on said driving-shaft, a strap embracing said eccentric, a universaljoint connection between the strap and the feed-dog-carrying bar, and a looper operatively connected with the driving-shaft, land having an oscillating movement on an axis at an angle to the axis of the driving-shaft; substantially as described.

4. In a sewing-machine having a cylindrical casing and a driving-shaft extending lengthwise thereof,a feed-dog-carryin g bar arranged parallel with said driving-shaft, an eccentric adjustably inclined on said driving-shaft, a strap embracing said eccentric, a universaljoint connection between the strap and the feed-dog-carrying bar, and a looper operatively connected with the driving-shaft and with its longitudinal axis arranged substantially longitudinally of the bed-plate; Isubstantially as described.

5. The herein-described looperoperating mechanism for sewing-machines comprising a looper-carrier having op-positely-extending trunnions, a fulcrum-pin set therein, and means for adjusting said pin, and a looperrod fulcrumed on said pin; substantially as described.

6. The herein-described looperoperating mechanism for sewing-machines and the like comprising a looper-carrier having oppositelyextending trunnions mounted to slide and rock in fixed bearings its sliding movements being bodily in a right line across the line traversed by itin its rocking movements, an operating-rod for said carrier, and an adj ustable post or pin on which the operating-rod is fulcrumed; substantially as described.

7. A looper-operating mechanism comprising a looper-carrier mounted to slide and rock, the socket-piece set therein, the looper-rod passing therethrough, said looper-rod being slotted, and a pin or post adjustable on the machine-frame engaging the slot in the looperrod; substantially as described.

8. A looper-operating mechanism comprising a looper, a carrier therefor, a rod driven from the main shaft and an adjustable fulcrum therefor, comprising a post extending down through an opening in the bed-plate, a sleeve surrounding the same, and means for holding the post and sleeve i-n position 3 substantially as described.

9. A looper-operating mechanism comprising a looper, a carrier therefor, a rod driven from the main shaft and an adjustable fulcrum therefor, comprising a post extending down through an opening in the bed-plate, aV

sleeve surrounding the same having a head resting on the casing and having its lower part extending below the casing and screwthreaded to receive a nut, said post having a shoulder resting on thehead of the sleeve and a nut on its lower end; substantially as described.

10. A sewing-machinev comprising a bedplate, a feeding mechanism moving in a defined path longitudinally thereof and aloopercarrier, a thread-carryin g looper therein, said looper being arrangedwith its longitudinal axis approximately parallel with the line of feed, and means for giving said looper an oscillatory movement in the direction of its length and a bodily-sliding movement transverse to the line of feed and also across the line traversed by said looper in its oscillating movement; substantially as described.

1l. A sewing-machine comprising a bedplate, a feeding mechanism moving in a deined path longitudinally thereof,'and a loopercarrier, a thread-carrying looper thereon, said looper being arranged with its longitudinal axis approximately parallel with the line of feed, and means for giving said looper an oscillatory movement vin the direction of its length and a sliding movement across the line roo traversed by said looper in its oscillating In testimony whereof I affix my signature movement, said means comprising a drivngin presence of two Witnesses. shaftztlso exteudinrlongitudinallyof the bed- T T T plate and au ineliled pin eecentreally con- LAL SmG OLDERDONK' 5 neeted to the driving-shaft, and operatively Vitnesses:

engaging the koper-carrier; snbstzmtallyas C. L. STURTEVANT, described. HARRY Y. DAVIS. 

